... proof * easy for use * small size for pocket * CE,ROHS,LFGB,FCC * key: ON/OFF,C/F,MAX/MIN,HOLD Digital cooking thermometer1 ... *1.5*15cm10.water proofOPERATION:1.Press ON/OFF button for turn on .2.Probe into test substance 2"(50mm).3 ... temperature unit.6.Hold ON/OFF 4S to turn off. digital thermometer